US Patent 9303844 Lighting device combining a lens unit

Provided is a lighting device, including: a lens unit including one or more lenses; and a light source unit which converts light emitted from a light emitting unit to surface light source and supplies the light to the lens unit, wherein the light source unit is integrally connected to the lens unit, whereby an entire thickness and volume of the product can be reduced and the lighting device can be applied to the fields of various illumination technologies, thereby having generality.